Which of the following phrases given below the sentence should replace the phrase printed in bold letters to make the sentence grammatically correct? Choose the best option among the five given alternatives that reflect the correct use of phrase in the context of the grammatically correct sentence. If the sentence is correct as it is, mark “No improvement required” as the answer.

A good percentage of all homeless people suffer of some untreated mental affliction.

Correct option is A

The correct answer is: (a) from some untreated mental.
· "Suffer of" is incorrect usage. The correct preposition is "suffer from" when referring to afflictions or ailments.
· "Mental" is correctly paired with "affliction" in the original sentence.
Corrected sentence:
A good percentage of all homeless people suffer from some untreated mental affliction.